Sione
Vaki.
Sione
Vaki.
Utah· 5'11"· 210 lb· 4.62s 40
"The rare prospect whose best tape came on the wrong side of the ball: Vaki hits like a safety, runs like a back, and asks a defensive coordinator to build the job around him."Pre-draft read
Vaki is a 5-11, 210-pound safety who spent 2023 doing two jobs, and the identity trait in both is contact. On defense he lines up in the box and at two-high depth but plays his best football downhill: he triggers fast on run keys, takes efficient angles, and finishes as a wrap tackler rather than a launcher.
The second job separates him. With the backfield gutted by injury, he took 42 carries for 317 yards and caught 11 balls for 203, averaging 7.6 a pop with real vision and contact balance. He was also a blitz weapon, turning that same trigger into 8.5 tackles for loss. Coverage is the softer half — fine in zone with eyes on the quarterback, less comfortable turning and running. The 4.62 speed caps the range; the toughness does not.
Split-safety defense that lives in the box: a downhill strong safety / dime linebacker role with heavy simulated-pressure and run-fit responsibility, not a single-high range assignment
Year 1: core four-phase special teamer and third safety in run-heavy packages. Ceiling: 600-snap box safety who plays the run like a linebacker, blitzes on passing downs and stays on the field in 12 personnel.
A single-high Cover 3 defense that asks its free safety to cover the deep middle from hash to hash — the 4.62 speed and tight hips leave him trailing seams and post routes.
Value drops sharply if a staff converts him to running back, where his tackling and blitz timing are worth nothing.
Sione Vaki | DB/RB | Utah | 2023 Highlights | 2024 NFL Draft
Full two-way reel from his breakout sophomore season: box tackling, blitzes and running back reps.
Sione Vaki Highlights | 2024 NFL Draft
Pre-draft cut-up focused on his downhill trigger and finishing as a tackler.
Detroit Lions Select Utah Utes Safety Sione Vaki In Fourth Round Of 2024 NFL Draft
Draft-night selection and the Lions' framing of his two-way role.
Vaki is a football player before he is a position, and any evaluation has to start there. He is a two-year starter at safety with a compact, thick build, an alarm-clock trigger against the run, and a special teams profile teams could bank on from day one. The projection question was never effort or toughness — it was whether the coverage range and long speed would hold up as a full-time NFL defensive back.
The context matters. After two years on a religious mission, he arrived at Utah in 2022 and played immediately, then broke out in 2023 with 51 tackles, 8.5 TFL and two sacks while moonlighting at running back because the Utes had nobody else. That 520-yard offensive cameo made him a story and a First Team All-Pac-12 pick, but it cut both ways: it showed rare toughness and ball skills, and it meant his defensive tape came with fewer reps and more variance than a pure safety's. The flags were clean — his ceiling was tied to a 4.62 forty and a straight-line movement profile.
The board had him in the Day 3 range as a special teams ace with a defined defensive backup role. Detroit taking him at 132 was a Dan Campbell pick in the purest sense: buy the temperament, figure out the position later. In fact the Lions immediately listed him at running back.
- 01
Run trigger
Diagnoses run action quickly from the box and arrives with force; his downhill burst is the reason Utah kept moving him closer to the line.
- 02
Tackling reliability
Deliberate, feet-under-him striker who wraps and finishes rather than diving at hips; misses were rare on 92 career stops.
- 03
Blitz value
Utah used him as a pressure piece and he produced 8.5 tackles for loss and two sacks in 2023 with timing and a knack for finding the gap.
- 04
Two-way toughness
Took 42 carries for 317 yards and 11 catches for 203 when the backfield ran out of bodies, with genuine vision and contact balance.
- 05
Special teams profile
Built and wired for coverage units; he led the Lions with eight special teams tackles as a rookie and made the PFWA All-Rookie Team.
- 01
Long speed
A 4.62 forty at 210 pounds limits his carry-over range and makes him a liability chasing vertical routes from single-high alignments.
- 02
Change of direction
Tight in the hips when asked to open and run; transitions cost him a beat against route runners with real quickness.
- 03
Coverage experience
Fewer clean reps in man and split-safety duty than most two-year starters because of the time spent playing offense in 2023.
- 04
No true position
Not big enough to play linebacker and not rangy enough to be a full-time deep safety, which narrows the defensive path.
— — — positional median (p50)
- 40 yd
- 4.62sp50
- Vertical
- 39.5inp50
- Broad jump
- 125inp50
- Three-cone
- —s
- Shuttle
- —s
- Bench
- 20repp50
| Yr | Team | G | Tkl | Sk | Int | PD | FF |
|---|---|---|---|---|---|---|---|
| 2022 | Utah | 14 | 41 | 0 | 0 | 3 | 1 |
| 2023 | Utah | 12 | 51 | 2 | 1 | 2 | 0 |
| Career | — | 26 | 92 | 2 | 1 | 5 | 1 |
Verified against cfbstats. Two seasons only (2022-23) after a two-year religious mission; 2023 offensive production came as an emergency running back.
A dash means the figure is not published by a source we trust — never a zero we invented.
Honors
- First Team All-Pac-12 (2023)
- Second Team All-American (2023)
- Senior Bowl invitee
- Polynesian College Football Player of the Year finalist (2023)
Instinctive, speed-limited safety whose NFL value lives on special teams and in subpackage depth.
Best case as a heavy box safety who becomes a starting-caliber run defender and blitz piece.
Floor if the athletic limits keep him off defense entirely and the roster spot depends on coverage units.
Everything above is the pre-draft evaluation. This section is what actually happened — updated year over year.
Detroit did not draft a safety; they drafted a running back. Vaki was moved to offense before his first camp, and the Lions used him almost exclusively as a special teams weapon behind Jahmyr Gibbs and David Montgomery. His 2024 rookie year was a genuine success on those terms: 16 games, eight special teams tackles to lead the club, two kickoff returns for 55 yards, and a nominal offensive line of six carries for 14 yards and three catches for 37, capped by a PFWA All-Rookie Team nod as a special teamer. The 2025 season narrowed further. He appeared in 11 games, took one carry for four yards, and produced 10 special teams tackles, with the backfield healthy and no path to touches.
In hindsight the pick has landed where a fourth-rounder like this usually does: a core teams contributor whose position change removed both his best trait and his clearest job. Playing him as a running back turned an instinctive, downhill defender into a fourth-string tailback, and it is fair to wonder whether a safety and dime-blitzer role would have produced more. Detroit got a real special teams asset on a cheap rookie deal, which is what round four is for, but the two-way novelty that made him famous has not translated into scrimmage snaps.
Data note: Verified against cfbstats. Two seasons only (2022-23) after a two-year religious mission; 2023 offensive production came as an emergency running back.